卢渊，性温雅寡欲，有祖父之风，敦尚学业，闺门和睦。袭侯爵，拜主客令，典属国。迁秘书令、始平王师。以例降爵为伯。给事黄门侍郎，迁兼散骑常侍、秘书监、本州大中正。

    是时，高祖将立冯后，方集朝臣议之。高祖先谓渊曰：“卿意以为何如？”对曰：“此自古所慎，如臣愚意，宜更简卜。”高祖曰：“以先后之侄，朕意已定。”渊曰：“虽奉敕如此，然于臣。实有未尽。”及朝臣集议，执意如前。冯诞有盛宠，深以为恨，渊不以介怀。

    及车驾南伐，赵郡王干督关右诸军事，诏加渊使持节、安南将军为副，勒众七万将出子午。寻以萧赜死，停师。是时泾州羌叛，残破城邑，渊以步骑六千众号三万，徐行而进。未经三旬，贼众逃散，降者数万口，唯枭首恶，余悉不问。诏兼侍中。初，渊年十四，尝诣长安。将还，诸相饯送者五十余人，别于渭北。有相者扶风人王伯达曰诸君皆不如此卢郎虽位不副实然德声甚盛望逾公辅。后二十余年，当制命关右。愿不相忘，此行也。相者年过八十，诣军门请见，言叙平生。未几，拜仪曹尚书。高祖考课在位，降渊以王师守常侍、尚书，夺常侍禄一周。寻除豫州刺史，以母老固辞。

    寻遭母忧，高祖遣谒者诣宅宣慰。服阕，兼太尉长史。高祖南讨，又兼彭城王中军府长史。寻为徐州京兆王愉兼长史，赐绢百匹。愉既年少，事无巨细，多决于渊。渊以诚信御物，甚得东南民和。南徐州刺史沈陵密谋外叛，渊觉其萌渐，潜敕诸戍，微为之备。屡有表闻，朝廷不纳。陵果杀将佐，勒宿豫之众逃叛。滨淮诸戍，由备得全。陵在边历年，阴结既广，二州人情，成相扇惑。陵之余党，颇见执送，渊皆抚而赦之，惟归罪于陵，由是众心乃安。

    景明初，除秘书监。二年卒官，年四十八。赠安北将军、幽州刺史，复本爵固安伯，谥曰懿。

（选自《魏书·卢渊传》，有删节）

在酸溶液中滴入紫色石蕊呈____色，在碱溶液中滴入无色酚酞呈____色。

There, on the ground, ________ an old man in dirty clothes.

    While some lucky people are born with the gift of artistic power, others have to study to become fluent in the language of art.____ If the artistic path is calling you, begin the journey with tiny steps and follow it. Here are some ways to show you how to become a true artist.

    Try a generous choice of differing forms of art. If you have never spent much time creating art, it may feel challenging to try to become an artist.____They just need to express their creative ideas in a great way. If there is a specific type of art you would like to learn more about, go for it, but don't be afraid to branch out and try other forms as well. Some of the most basic forms of art include drawing, painting, sculpting, and photographing.

    Do your research and learn the basics.____ Learn as much as you can about the medium-read books and articles, watch educational videos, and research various methods and other artists. One of the best ways to learn is by studying the work of others who have come before you. If you put effort, it is completely possible to teach yourself how to be a great artist. Need help?____ I'll work for sure.

    ____Many artists devote their lives to creating art. While you do not have to spend every single second of your day working on a painting, do try to dedicate some time each day (or every other day) to working on your project, whatever it might be.

A. Make creating art your favorite.

B. Make time for your art every day.

C. The truth is that all people are artists.

D. Pick up some books on your chosen form(s).

E. You can always further your research with an art class.

F. A key part of being an artist is observing the world around you.

G. Whichever path you are on, be clear that everyone is an artist.